Transition from Guile 2.0 to 2.2 ("not an ELF file")

[Björn Höfling]

Hi,

since my last guix update, I get this error message:

;;; ERROR: In procedure load-thunk-from-memory: not an ELF file
;;; WARNING: loading compiled
file /home/bjoern/.config/guix/latest/guix/scripts.go failed:

OK, I found out that it is related to the transition to Guile 2.2:

https://lists.gnu.org/archive/html/guix-devel/2017-05/msg00350.html

I admit, I used to use `guix pull but this time I really used the git
way to upgrade: 

cd guix
git fetch
./bootstrap
make check
./pre-inst-env guix system reconfigure g64.scm

After restart the problem popped up. Trying it a second time, still
same result.

I guess that ~/.config/guix/latest still points to the last ("2.0")
result of guix pull. Can I just remove that? Or fix it? Is there an
equivalent to guix-latest, the git-way?

One idea to get rid of the problem was to just use `guix pull` again,
but unfortunately that also went wrong:

guix pull: errror: libtiff-CVE-2017-7593.patch: patch not found.

Any ideas of how to get into the 2.2-world?

Björn